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Fixing device and image forming device

A technology of a fixing belt and a pressing member, applied in the fields of image forming devices and fixing devices, can solve the problems of increasing clamping pressure, abrasion of the fixing belt, damage to the durability of the fixing belt, etc.

Inactive Publication Date: 2017-06-13
KYOCERA DOCUMENT SOLUTIONS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This may cause rapid wear of the fixing belt, impairing the durability of the fixing belt.
In addition, when the fixing belt rotates under a large sliding load and repeatedly bends corresponding to the shape of the sliding contact member, the fixing belt may be damaged.
[0006] In addition, in order to rotate the fixing belt in a state where a certain tension is applied to the entire area of ​​the fixing belt, it is necessary to increase the nip pressure (the pressure of the fixing nip), thereby increasing the driving torque of the fixing belt (the fixing belt Torque required for turning) increases
In addition, as described above, when the nip pressure is increased, in order to ensure the strength to withstand the increased nip pressure, it is necessary to increase the size of each component of the fixing device, which may lead to an increase in the size of the entire fixing device.
Also, as mentioned above, when the nip pressure increases, the force of the fixing belt being biased to one side in the longitudinal direction increases, so that the end of the fixing belt may interfere with other components and be damaged.

Method used

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  • Fixing device and image forming device
  • Fixing device and image forming device
  • Fixing device and image forming device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0017] First, refer to figure 1 The overall configuration of the printer 1 (image forming apparatus) will be described.

[0018] The printer 1 has a box-shaped printer body 2 , a paper feed cassette 3 for containing paper (recording media) is housed in the lower part of the printer body 2 , and a paper output tray 4 is provided on the upper surface of the printer body 2 . On the upper surface of the printer main body 2 , an openable and closable upper cover 5 is attached to the side of the output tray 4 , and a toner cartridge 6 is accommodated under the upper cover 5 .

[0019] On the upper part of the printer main body 2 , an exposure unit 7 constituted by a laser scanning unit (LSU) is disposed below the discharge tray 4 , and an image forming unit 8 is disposed below the exposure unit 7 . In the image forming section 8, a rotatable photosensitive drum 10 as an image carrier is provided, and around the photosensitive drum 10, along the rotation direction of the photosensit...

no. 2 Embodiment approach

[0062] Next, refer to Figure 4 and Figure 5 The fixing device 41 according to the second embodiment of the present invention will be described. In the following, for the convenience of explanation, the Figure 4 The front side (front side) of the fixing device 41 is defined as the near side of the paper. Figure 4 Arrow Y in indicates the direction in which paper is conveyed. Figure 5 Arrow Fr in , indicates the front side (front side) of the fixing device 41 . In addition, since the structure other than the winding roller 42 (winding member) is the same as that of the first embodiment, it is denoted by the same reference numerals as in the first embodiment, and its description is omitted.

[0063] Such as Figure 4As shown, the winding roller 42 is arranged on the side opposite to the pressure roller 22 with the driving roller 23 interposed therebetween. The winding roller 42 is provided so as to sandwich the fixing belt 21 with the driving roller 23 . The winding r...

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PUM

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Abstract

A fixing device (18, 41) includes a fixing belt (21), a pressuring member (22), a driving member (23) and a slide contact member (25). The fixing belt (21) is arranged rotatably. The pressuring member (22) comes into pressure contact with the fixing belt (21) to form a fixing nip (35) and is arranged rotatably. The driving member (23) is arranged so as to sandwich the fixing belt (21) with the pressuring member (22) and rotates the fixing belt (21). The slide contact member (25) is arranged so as to sandwich the fixing belt (21) with the pressuring member (22) and comes into slide contact with the fixing belt (21). The fixing belt (21) is engaged around the driving member (23) and slide contact member (25) with a state having looseness at least partially.

Description

technical field [0001] The present invention relates to a fixing device for fixing a toner image on a recording medium, and an image forming apparatus having the fixing device. Background technique [0002] Conventionally, an electrophotographic image forming apparatus such as a copier or a printer has a fixing device for fixing a toner image on a recording medium such as paper. A heat roller system is widely used in this fixing device. The heat roller method refers to a method in which a fixing nip is formed by bringing a pair of rollers into pressure contact. However, in order to sufficiently secure the nip width (the width of the fixing nip) by the heating roller method, it is necessary to increase the outer diameter of each roller forming the fixing nip, thereby increasing the heat capacity of the members forming the fixing nip. increase. Therefore, the recovery time of the fixing device (the time until recovery to a state where the toner image can be fixed on the rec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03G15/20G03G15/00
CPCG03G15/2053G03G15/2064G03G2215/2035G03G2215/2025
Inventor 金松良治
Owner KYOCERA DOCUMENT SOLUTIONS INC
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